import { Sample } from "../HelloTriangle/Sample";

import { Dragon } from "../Light/Dragon";

import { LightShadowPlugin } from "./LightShadowPlugin";

import { Light } from "../Light/Light";

export class Shadow_Sample extends Sample {

private started: boolean = false;

protected async start(renderer: GPURenderer): Promise<void> {

if (this.started) return;

this.started = true;

const dragon = new Dragon();

dragon.debug = "dragon";

dragon.model.scaleXYZ = 600;

renderer.addPipeline(dragon)

const plugin = new LightShadowPlugin(dragon, {

position: dragon.position,

normal: dragon.normal,

modelMatrix: dragon.model,

cameraMatrix: dragon.camera

}).apply() as LightShadowPlugin;

const light: Light = plugin.light;

light.y = light.z = renderer.canvas.width * 0.9;

const now = new Date().getTime();

dragon.camera.eyePosition.y = renderer.canvas.height * 0.4;

dragon.addEventListener(RenderPipeline.ON_DRAW_BEGIN, () => {

const time = (new Date().getTime() - now) / 1000;

dragon.camera.rotationY += 0.01;

light.r = Math.abs(Math.sin(time))

light.g = Math.abs(Math.cos(1 + time * 0.66))

light.b = Math.abs(Math.sin(2 + time * 0.33))

});

}

}